A 36-year-old woman with a parathyroid cyst

Background: Parathyroid cysts are rare entities. They account for less than 0.5% of parathyroid lesions. They are divided into two main groups: functioning and non-functioning. Case description: We present a 36- year-old woman with complaints of palpitations, sweating, and nervousness of about 2 months’ duration. From an ultrasound of the thyroid gland with data on anechoic formation under the lower pole of the left lobe of the thyroid gland with dimension 14/16/24 mm. Fine needle aspiration (FNA) of the formation was performed with aspiration of about 5 ml of clear liquid and examination of washout. PTH from the washout of the extrathyroidal lesion-1040 pg/ml. A month later with ultrasound data on recurrence of the formation; repeated aspiration of about 5 ml of blood fluid was performed with subsequent application of 1 ml of absolute alcohol intranodal. Conclusion: Thirty days after the procedure with ultrasound data of slight regression in the dimension: 10/11/20 mm.